Franz quatram



(No Model.)

I. QUATRAM. REGISTERING APPARATUS FOR TELEPEONES.

Patented Feb. 4, 1896.

G O 0 O O UGDQUQ E Banana Witnesses:

AN DREW BANANA-H FNUTUHIFHQWASKINGTDH. D C

NITED STATES PATENT OF ICE.

FRANZ QUATRAM, OF PANKOV, GERMANY.

REGISTERING APPARATUS FOR TELEPHO NES.

SPECIFICATION forming part of Letters Patent No. 553,964, dated February4, 1896.

Application filed July 26, 1895. Serial No. 557,199. (No model.)

To ail whom it may concern:

Be it known that I, FRANZ QUATRAM, a subj ect of the German Emperor,residing at Pankow, near Berlin, Germany, have invented new and usefulImprovements in Registering Apparatuses for Telephones, of which thefollowing is a specification.

My invention relates to that class of telephone systems in which theseveral subscribers are connected by a central office; and the object ofmy invention is to provide means by which the use of the telephone isnot registered unless the user connected by the central office to thesubscriber called for is informed by the latter of his being present andready for communicating with him. I attain this object by the meansillustrated in the accompanying drawings, in which- Figure 1 is adiagrammatical view of an in dividual apparatus of my invention inconnection with the telephone and the signal-bell of a single station,and Fig. 2 a similar view of two stations provided each with myinvention and connected to each other by the central officeJ Similarletters and figures refer to similar parts throughout both views.

Referring first to Fig. 1, my apparatus consists of a battery B,connected by two conductors to a commutator V, which consists of twoswitch-levers secured parallel to each other by a cross-piece, theright-hand continuation of which actuates the registering device Z, andof contact-pieces 24: 1 19. Another commutator L, consisting of twosimilar switch-levers and contact-pieces 18 12 20, is connected to theground-wire at 17 and at 13 to the wire conducting to the centraloflice. Contact-pieces 2% 19 of the commutator T are respectivelyconnected by conductors and further connected by another conductorextending from piece 19 to piece 18.

A disk S, of metal, journaled-at 7 in a support R, likewise of metal, isprovided with a laterally-projecting pin 6 and with strips or pieces 0of an insulating material at its edge, so as to form a discontinuouscontact-surface, against which bears a contact-spring .2, connected atits other end at 2 by conductors to, the contact-piece 1 of commutatorWV vand to.

a contact-pin 3. Another contact-spring, Y, bears against pin 6 in thenormal position of disk S, as represented in Fig. 1, and the other endof spring Y is connected at 5 by a conductor to a switch-lever T,pivoted at 4 and held in position by a spring V, so as to bear against apin 23. A conductor extends from the latter pin to the alarm device K,entering the same at 22, and is in circuit'with a conductor passing fromcontact-piece 20 of commutator L and entering the device K at 21.

A contact-piece 11 is connected by a conductor to the contact-piece 12of commutator L and by another conductor to the telephone device F, thesaid conductor entering the device F at y and being connected to one ofthe telephone-wires, while another conductor, 9, connected to the othertelephone-wire, leaves the device F at w and extends to a contactpiece10, in which is pivoted a magnetic bar m. The northern pole n of thelatter bears normally against a contact-pin of piece 11.

Conductor 9 is connected to the support R referred to heretofore by abranch 8 coiled on reels U U mounted on cores a b of soft iron, thusforming an electromagnet, and the south pole of bar 'm will be attractedby the core a, when the positive current passes through conductor 8, asindicated in Fig. 1 by positive arrows, and by the core Z), when thedirection of the positive current has been inverted by switching thecommutator W, as indicated by dotted lines with reference to thecommutator NV and to the bar on. By these means when bar m occupies itsdotted position the circuit is broken between the bar and thecontact-piece l1, and the current cannot pass but through the telephone,but

when bar m is in contact with piece 11, although the telephone-circuitis closed as heretofore, the current will not pass through thetelephone, but take the shorter way through bar m between contact-pieces10 11 by reason of its resistance being lower than that afforded by thetelephone-coil.

Referring to Fig. 2, the left-hand part Q of this figure corresponds toFig. 1, and no further description is deemed necessary while in theright-hand station H the indexed numerals respectively corresponding tothe noniiideked ones of station Q indicate similar parts. In this figurethe central office is indicated by A and the ground-line by E, and thesubscriber of station Q is supposed to call ICO for communicating withthe subscriber of ing the said ringing-signal by means of disk stationH, so that the use of the telephone is S, when passing by spring [2, isas follows:

to be registered at station Q.

From the foregoing the working of my apparatus will be understood to beas follows: The subscriber at Q brings firstly the commutator L into theposition indicated by dotted lines in Fig. 1 and by full lines in Fig.2. Then he turns lever T against contact-pin 3, as indicated by dottedlines in Figs. 1 and 2, whereby the circuit of the battery B is closedas follows: 13*, 1, 2, 3, l, 5, f, (i, S, 7, U, 8, 9, 10, 771, 11,12,13, ll, 15, A, E, 16, 17, 18, 19 to B, and the current thus sent fromthe battery to the central oflice by ringing a bell or releasing anannunciator at that office calls the officer. The positive current ofthe said circuit being supposed to take the way indicated by thepositive arrows of Fig. 1, the magnetic bar m will remain in its normalposition represented by full lines. The subscriber at Q their releaseslever T, which returns by spring V to its normal position i c to bearagainst contact-pin The ofiicer of the central oflice having been calledcloses a circuit of a battery placed at that office and the positivecurrent thus taking the way: A, 15, 14, 13,12, 11, 10, 9, S, U, 7, S,6,f, 5, l, 23, 22, K, 21, 20, 18, 17, 16, E, A rings the alarm-bell Kand turns bar m into the position indicated by dotted lines, so as tobreak the contact be tween the said bar and contact-piece 11 and bringthe telephone F into the said circuit.

The subscriber is thus enabled to communicate by the telephone with theofficer at the central station, in order to inform him of the subscriberhe wants to be connected with. This connection having been made with thesubscriber at II, the subscriber at Q turns again lever T against pin 3,whereby the magnetic bar 177 is brought again into its full-lineposition and the alarm device K of station II will be rung by thepositive current, as follows: 13 1, 2, 3, 4:, 5,f, 6, S, 7, U, 8, 9, 10,m, 11, 12, 13, 14:, 15, A, 15, 11, 13, 20, 21, K, 22, 23, 4: 5, f, (5,S, '7, U, 8, 9, 10, m, 11, 12, 17, 16, E, 16, 17,18, 19 to B. Thesubscriber at Q then releases lever T which swings back against pin 23,and the subscriber at H, if present and ready for communicating with thecalling subscriber, turns disk S around once, whereby the edge of thisdisk when passing by the contactspring 2" brings about an intermittingringing-signal at K, corresponding to the disposition of the insulatingstrips and pieces provided on the edge of disk S, and consisting ofdistinct sounds differently timed, indicating the several numbers 0, 1,2, 3, 4c, 5, 6, 7, 8, 9 on the same principle as letters are indicatedby points and dashes in the Morse telegraph. The disk S of eachsubscriber is of individual construction so as to correspond with hissubscribing number, and the subscriber at Q is thus enabled to verify bythe signal given that he is just connected with the subscriber he wantsto communicate with. The circuit perform- 17, 16, E, 16, 17, 1s, 20, 21,K,

b, s, 7, U, s, 0, 10, m, 11, 12,13, 11, 15,11,

15, 11, 13', 20, 18, 19 to B, the contact between springf and pin 6being broken during the turning movement of disk S. The subscriber at Qthus being sure that he will use his telephone as intended brings nowthe commutator WV into the position indicated by dotted lines in Figs. 1and 2 and turns lever T against contact-pin 3, the circuit of battery Bthus being closed, as follows: 13 21, 19, 1s, 17, 10, E, 10, 17, 12, 11,m, 10, 0, S, 1", T, S, l3,f, 5', 4, 23, 22, K, 21, 20, 1:1, 11, 15', A,15, 11, 13, 12, 11, m, 10, 0, s, U, 7, S, 5, 5, l, 3, 2, lto B. Thepositive current thus passing through the electromag nets U and U in aninverted direction, the bars m and m will be brought into the dottedlineposition, breaking the contact with pieces 11 and 11, respectively. Inthe same line, by shifting the commutator W into the dottedlineposition, the registering device Z has been actuated and the use of thetelephone has been registered. The subscriber at Q then releases leverT, which returns into contact with pin 23 and brings back the commutator1V into the position represented by full lines. The circuit is nowclosed as follows: F, fl], 11, 12, 13, 11, 15, A, 15, 14,, 1.3, 20, 21,K, 23, L: f S: U, a F: 1] 11, 12, 17, 16, E, 16, 17, 18, 20, 21, K, 22,23, 4s, 5, f, 6, S, 7, U, 8, 9, an, F. The telephones F and F thus beingin the circuit, the subscribers at Q and H can communicate with eachother. The communication having been finished, the subscriber at Q givesthe ringing of signal by turning lever T against pin 3, whereby the barsm and on are returned to their normal position, (indicated by fulllines,) and then releasing lever T, and shifts finally the commutator Lto its full-line position, the apparatus at Q thus being in the samecondition as that at station H and ready for being called on by anyother subscriber.

In order to advertise an absent subscriber of his having been calledfor, I combine a Morse apparatus with my invention registering thecall-signal in the usual manner. The subscriber at H, for instance,before leaving his office will then turn out of the circuit the alarmdevice K and insert instead thereof a Morse apparatus.

The subscriber at Q, when calling for the subscriber at H and receivingno counter-signal, may then turn his disk S once round so as to printhis subscribing number on the strip of the; Morse apparatus at H withoutshifting the commutator \V nor actuating the registering device, and thecommunication called for may be performed after the return of the absentsubscriber informed by the printed strip of his having been wanted.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a registering apparatus for telephones the combination of abattery B, a commutator V in circuit with the battery, a registeringdevice Z actuated by the commutator, an electromagnet U, in circuit withthe commutator and with the telephone F, a switch T for breaking andclosing the circuit between the commutator and the electromagnet, and amagnetic switch-bar m, actuated by the electromagnet, for breaking andclosing the circuit between the electromagnet and the telephone, allsubstantially as set forth and for the purposes specified.

2. In a registering apparatus for telephones the combination of abattery B, a commutator W in circuit with the battery, a registeringdevice Z actuated by the commutator, an electromagnet U in circuit withthe commutator and with the telephone F, a switch T for breaking andclosing the circuit between the commutator and the electromagnet, amagnetic switch-bar m, actuated by the electromagnet, for breaking andclosing the circuit between the electromagnet and the telephone, acommutator L in circuit with the central office, a conductor connectingthe commutator L to the telephone, and a conductor connecting thecommutators V and L, all substantially as set forth and for the purposesspecified.

3. In aregisterin g apparatus for telephones the combination of abattery B, a commutator V in circuit with the battery, a registeringdevice Z actuated by the commutator, an electromagnet U in circuit withthe commutator and with the telephone F, a switch T for breaking andclosing the circuit between the commutator and the electromagnet,amagnetic switch-bar m, actuated by the electromagnet for breaking andclosing the circuit between the electromagnet and the telephone, acommutator L in circuit with the central oflice, a conductor connectingthe commutator L to the telephone, a conductor connecting thecommntators W and L, an alarm device K, a conductor connecting thecommutator L to the alarm device and a conductor connecting the alarmdevice to the switch T, all substantially as set forth and for thepurposes specified.

In witness whereof I have signed this specification in presence of twoWitnesses.

' FRANZ QUATRAM. W'itnesses:

WM. IIAUPT, E. HILDEBRANDT.

